Any chance you could email a higher resolution pic of that diagram?
And if I am reading it correctly, the actuators are powered by a Violet/gray and Gray/ brown wires. Have an idea as to the gauge i would look for?

And if I guess right, they will be in the conduit under the sill, crossing over in the middle "T".

I didn't see any wires that really looked like a heavy enough gauge. Although, maybe the electronics are today where they don't need the gauge capacity of days past.